FILE - In this Sept. 30, 2012 file photo, Kansas City Chiefs inside linebacker Jovan Belcher (59) gestures at the line of scrimmage during an NFL football game against the San Diego Chargers in Kansas City, Mo. Police say Belcher fatally shot his girlfriend early Saturday, Dec. 1, 2012, in Kansas City, Mo., then drove to Arrowhead Stadium and committed suicide in front of his coach and general manager. (AP Photo/Ed Zurga, File)

KANSAS CITY, Mo. (AP) — People are coming and going from the house where a day before Chiefs linebacker Jovan Belcher shot and killed his girlfriend before committing suicide in front of his coach.

Police did not release any additional information about Saturday's murder-suicide. Belcher and his girlfriend, 22-year-old Kasandra M. Perkins, had a 3-month-old daughter.

A man who answered the door at the couple's house Sunday asked reporters, "Can you all respect grieving?"

A short time later, two men loaded bags in a car, and two women drove away in it.

Neighbors in the Kansas City subdivision are stunned. Thirty-one-year-old Kristen VanMeter said she had taken community-college courses with Perkins.

She called the murder-suicide a "surprise" and questioned what triggered it. Police reiterated Sunday that the couple had argued recently.